wait-for-ssh.sh

#!/bin/bash
ip=$1
maxConnectionAttempts=10
sleepSeconds=10
#Waiit until SSH on Bastion server is working
echo "Attempting to ssh"
index=1

while (( $index <= $maxConnectionAttempts ))
do
  status=$(ssh -o BatchMode=yes -o ConnectTimeout=5 $ip echo ok 2>&1)
  if [[ $status == ok ]] ; then
    exit
  elif [[ $status == *"Permission denied"* ]] ; then
    exit
  else
    echo "can't connect, retry..."
  fi
  sleep $sleepSeconds
  ((index+=1))
done
echo "Can't connect to ssh. Timeout" 1>&2